fix: speech to text (#26)

* refactor: remove STT encoding to stop empty response

* refactor: better TTS struct design

* chore: revert CI-RS toolchain

* chore: remove unused dependencies

* refactor: switch to agents

.env.example

@@ -7,4 +7,4 @@ OPENAI_API_KEY=""
 OPENAI_ORG_ID=""
 
 ELEVENLABS_API_KEY=""
-DEEPGRAM_API_KEY=""
+DEEPGRAM_API_KEY=""

.github/workflows/ci-rs.yml

@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         rust-toolchain:
-          - nightly-2023-09-20
+          - nightly
 
     steps:
       - name: Get source code
@@ -35,9 +35,8 @@ jobs:
         uses: brndnmtthws/rust-action@v1
         with:
           toolchain: ${{ matrix.rust-toolchain }}
-          components: rustfmt, clippy, cargo-bloat
+          components: rustfmt, clippy
           enable-sccache: "true"
-          cargo-packages: "cargo-bloat"
 
       - name: Install binaries
         run: sudo apt-get update && sudo apt-get install -y clang pkg-config libavfilter-dev libavdevice-dev libavcodec-dev libavformat-dev libavutil-dev